论文标题
片上单光子源的基于山脊波导的纳米孔腔的设计和制造
Design and fabrication of ridge waveguide-based nanobeam cavities for on-chip single-photon sources
论文作者
论文摘要
我们报告了基于芯片的，基于量子点的单光子生成的山脊波导中的纳米孔/纳米孔腔的设计。我们的设计在发射机模式耦合效率方面克服了低折射 - 折线对比材料平台的局限性，并在输出岭波导中产生了0.73的超耦合效率。重要的是，这种高耦合效率与9 nm全宽度最大最大的宽带操作结合使用。我们提供了一个明确的设计程序，用于根据开发的设计识别最佳的几何参数。此外，我们制造并在光学上表征了概念验证的波导结构。麦粒发光测量结果为量子点的自发发射提供了证据，从而支持我们设计对片上单光子源应用的潜力。
We report on the design of nanohole/nanobeam cavities in ridge waveguides for on-chip, quantum-dot-based single-photon generation. Our design overcomes limitations of a low-refractive-index-contrast material platform in terms of emitter-mode coupling efficiency and yields an outcoupling efficiency of 0.73 to the output ridge waveguide. Importantly, this high coupling efficiency is combined with broadband operation of 9 nm full-width half-maximum. We provide an explicit design procedure for identifying the optimum geometrical parameters according to the developed design. Besides, we fabricate and optically characterize a proof-of-concept waveguide structure. The results of the microphotoluminescence measurements provide evidence for cavity-enhanced spontaneous emission from the quantum dot, thus supporting the potential of our design for on-chip single-photon sources applications.
